I'm 24 years old I just noticed my top right front is slightly loose. How can I tighten it up

I suggest that you improve the condition of your gums to help with this problem. Putting a couple of drops of grapefruit seed extract (Nutribiotic) on your toothpaste before brushing will help kill bacteria.

You can also try using full strength 3% hydrogen peroxide on a proxa brush for cleaning between teeth, along with regular flossing. Diluted h.p. can be used as a rinse, don't swallow at all, spit it out.

Supplementing with vitamin D3 would also be helpful, at least 1,000 IUs per day.